# This is the recipe.sh script. It is executed by BPM in a temporary directory when compiling a source package
# BPM Expects the source code to be extracted into the automatically created 'source' directory which can be accessed using $BPM_SOURCE
# BPM Expects the output files to be present in the automatically created 'output' directory which can be accessed using $BPM_OUTPUT

# The prepare function is executed in the root of the temp directory
# This function is used for putting downloaded files to the correct location or applying patches
prepare() {
  cd "$BPM_SOURCE"

  # Do not treats warnings as errors
  sed -E -i 's/(^WARNINGS_ARE_ERRORS = -W)(error)/\1no-\2/' hotspot/make/linux/makefiles/gcc.make

  # bool is a keyword in C23.
  cat > gcc <<-EOF
#!/bin/sh
exec /usr/bin/gcc -std=gnu17 "\$@"
EOF
  chmod +x gcc

  # The use of the "register" keyword as storage class specifier has been removed in C++17.
  cat > g++ <<-EOF
#!/bin/sh
exec /usr/bin/g++ -std=gnu++14 "\$@"
EOF
  chmod +x g++
}

# The build function is executed in the source directory
# This function is used to compile the source code
build() {
  unset MAKEFLAGS
  unset JAVA_HOME

  # Use the gcc and g++ wrappers
  export PATH="$PWD":$PATH

  # Set CFLAGS and CXXFLAGS
  export CFLAGS="${CFLAGS//-O2/-O3} -fno-lifetime-dse -fno-delete-null-pointer-checks -fno-exceptions -Wno-error=int-conversion -Wno-error=incompatible-pointer-types"
  export CXXFLAGS="${CXXFLAGS} -fno-exceptions"

  [ -z "$BOOT_JDK" ] && export BOOT_JDK=/usr/lib/java/openjdk-${BPM_PKG_VERSION%%.*}/

  bash configure --enable-unlimited-crypto                       \
                 --with-extra-cflags="$CFLAGS"                   \
                 --with-extra-cxxflags="$CXXFLAGS"               \
                 --with-extra-ldflags="$LDFLAGS"                 \
                 --with-stdc++lib=dynamic                        \
                 --with-giflib=system                            \
                 --with-zlib=system                              \
                 --with-update-version=${BPM_PKG_VERSION:2:3}    \
                 --with-build-number=${BPM_PKG_VERSION##*.}      \
                 --with-cacerts-file=/etc/pki/tls/java/cacerts   \
                 --with-boot-jdk="$BOOT_JDK"
  make
  make docs
}

# The package function is executed in the source directory
# This function is used to move the compiled files into the output directory
package() {
  make -j1 images

  install -d "$BPM_OUTPUT"/usr/lib/java
  cp -a "$BPM_SOURCE"/build/*/images/j2sdk-image "$BPM_OUTPUT"/usr/lib/java/openjdk-${BPM_PKG_VERSION%%.*}
  chown -R root:root "$BPM_OUTPUT"/usr/lib/java/openjdk-${BPM_PKG_VERSION%%.*}

  # Remove unwanted files
  find "$BPM_OUTPUT" -name '*.diz'
  rm "$BPM_OUTPUT"/usr/lib/java/openjdk-${BPM_PKG_VERSION%%.*}/{LICENSE,ASSEMBLY_EXCEPTION,THIRD_PARTY_README,src.zip} # Licenses are placed in usr/share/licenses
  rm "$BPM_OUTPUT"/usr/lib/java/openjdk-${BPM_PKG_VERSION%%.*}/jre/{LICENSE,ASSEMBLY_EXCEPTION,THIRD_PARTY_README} # Licenses are placed in usr/share/licenses

  # Symlink cacerts
  ln -sf /etc/ssl/certs/java/cacerts "$BPM_OUTPUT"/usr/lib/java/openjdk-${BPM_PKG_VERSION%%.*}/jre/lib/security/cacerts

  # Install package license
  install -Dm644 "$BPM_SOURCE"/LICENSE "$BPM_OUTPUT"/usr/share/licenses/openjdk-${BPM_PKG_VERSION%%.*}/LICENSE
  install -Dm644 "$BPM_SOURCE"/ASSEMBLY_EXCEPTION "$BPM_OUTPUT"/usr/share/licenses/openjdk-${BPM_PKG_VERSION%%.*}/ASSEMBLY_EXCEPTION
  install -Dm644 "$BPM_SOURCE"/THIRD_PARTY_README "$BPM_OUTPUT"/usr/share/licenses/openjdk-${BPM_PKG_VERSION%%.*}/THIRD_PARTY_README
}